For some reason reply doesn't work so...
אני טבעונית ואני אוהבת פיצה! :)
May I correct your english, please? Omit the letter m from your first word. Whoever is in the nominative case in your sentence. Whomever would be an object such as a direct object (of a verb) or the object of a preposition. E.g., "I'll give my slice of pizza to whomever I choose." Whomever is the object of choose. But, "I'll give my slice of pizza to whoever wants it most." Whoever is the subject of a clause-- its verb is "wants." The whole clause is the object of "to." Yes, I realize this can be confusing, and many people mix them up.